This document discusses nocturnal emissions, also known as nightfall. It explains that nocturnal emissions are a natural occurrence where semen is ejaculated during sleep, often associated with erotic dreams. While some people feel nervous or guilty about nightfall, the document stresses that it is nothing to worry about and is a normal bodily function. Some tips are provided for those who want to reduce the frequency of nocturnal emissions, such as meditation, exercise, diet changes, and avoiding erotic stimuli before bed.